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   1  /*
   2   * see COPYRIGHT
   3   */
   4  
   5  /*    these definitions are mostly taken from Microsoft's True Type
   6      documentation.
   7  */
   8  
   9  #define BYTE unsigned char
  10  #define CHAR signed char
  11  #define USHORT unsigned short
  12  #define SHORT signed short
  13  #define ULONG unsigned int
  14  #define LONG signed int
  15  #define FWORD SHORT
  16  #define UFWORD USHORT
  17  
  18  #define ONOROFF    0x01
  19  #define XSHORT    0x02
  20  #define YSHORT    0x04
  21  #define REPEAT    0x08
  22  #define XSAME    0x10
  23  #define YSAME    0x20
  24  
  25  #define ARG_1_AND_2_ARE_WORDS        0x0001
  26  #define ARGS_ARE_XY_VALUES             0x0002
  27  #define XY_BOUND_TO_GRID            0x0004
  28  #define WE_HAVE_A_SCALE                 0x0008
  29  #define MORE_COMPONENTS                0x0020
  30  #define WE_HAVE_AN_X_AND_Y_SCALE    0x0040
  31  #define WE_HAVE_A_TWO_BY_TWO        0x0080
  32  #define WE_HAVE_INSTRUCTIONS        0x0100
  33  #define USE_MY_METRICS                0x0200
  34  
  35  typedef struct short_2 {
  36      SHORT    upper;
  37      USHORT    lower;
  38  } FIXED ;
  39  
  40  typedef struct longhormetric {
  41      UFWORD    advanceWidth;
  42      FWORD    lsb;
  43  } LONGHORMETRIC;
  44  
  45  typedef struct ttf_hhea {
  46      BYTE    version[4];
  47      SHORT    ascender, descender, lineGap;
  48      USHORT    advnaceWidthMax;
  49      SHORT    minLSB, minRSB, xMaxExtent;
  50      SHORT    caretSlopeRise, caretSlopeRun;
  51      SHORT    reserved[5];
  52      SHORT    metricDataFormat;
  53      USHORT    numberOfHMetrics;
  54  } TTF_HHEA;
  55  
  56  typedef struct ttf_dir_entry {
  57      char    tag[4];
  58      ULONG    checksum;
  59      ULONG    offset;
  60      ULONG    length;
  61  } TTF_DIR_ENTRY ;
  62  
  63  typedef struct ttf_directory {
  64      ULONG            sfntVersion;
  65      USHORT            numTables;
  66      USHORT            searchRange;
  67      USHORT            entrySelector;
  68      USHORT            rangeShift;
  69      TTF_DIR_ENTRY    list;
  70  } TTF_DIRECTORY ;
  71  
  72  typedef struct ttf_name_rec {
  73      USHORT    platformID;
  74      USHORT    encodingID;
  75      USHORT    languageID;
  76      USHORT    nameID;
  77      USHORT    stringLength;
  78      USHORT    stringOffset;
  79  } TTF_NAME_REC;
  80  
  81  typedef struct ttf_name {
  82      USHORT            format;
  83      USHORT            numberOfNameRecords;
  84      USHORT            offset;
  85      TTF_NAME_REC    nameRecords;
  86  } TTF_NAME ;
  87  
  88  typedef struct ttf_head {
  89      ULONG    version;
  90      ULONG    fontRevision;
  91      ULONG    checksumAdjust;
  92      ULONG    magicNo;
  93      USHORT    flags;
  94      USHORT    unitsPerEm;
  95      BYTE    created[8];
  96      BYTE    modified[8];
  97      FWORD    xMin, yMin, xMax, yMax;
  98      USHORT    macStyle, lowestRecPPEM;
  99      SHORT    fontDirection, indexToLocFormat, glyphDataFormat;
 100  } TTF_HEAD ;
 101  
 102  typedef struct ttf_kern {
 103      USHORT    version, nTables;
 104  } TTF_KERN ;
 105  
 106  typedef struct ttf_kern_sub {
 107      USHORT version, length, coverage;
 108      USHORT nPairs, searchRange, entrySelector, rangeShift;
 109  } TTF_KERN_SUB;
 110  
 111  typedef struct ttf_kern_entry {
 112      USHORT    left, right;
 113      FWORD    value;
 114  } TTF_KERN_ENTRY;
 115  
 116  typedef struct ttf_cmap_fmt0 {
 117      USHORT    format;
 118      USHORT    length;
 119      USHORT    version;
 120      BYTE    glyphIdArray[256];
 121  } TTF_CMAP_FMT0;
 122  
 123  typedef struct ttf_cmap_fmt4 {
 124      USHORT    format;
 125      USHORT    length;
 126      USHORT    version;
 127      USHORT    segCountX2;
 128      USHORT    searchRange;
 129      USHORT    entrySelector;
 130      USHORT    rangeShift;
 131  } TTF_CMAP_FMT4;
 132  
 133  typedef struct ttf_cmap_entry {
 134      USHORT    platformID;
 135      USHORT    encodingID;
 136      ULONG    offset;
 137  } TTF_CMAP_ENTRY;
 138  
 139  typedef struct ttf_cmap {
 140      USHORT            version;
 141      USHORT            numberOfEncodingTables;
 142      TTF_CMAP_ENTRY    encodingTable[1];
 143  } TTF_CMAP ;
 144  
 145  typedef struct ttf_glyf {
 146      SHORT    numberOfContours;
 147      FWORD    xMin, yMin, xMax, yMax;
 148  } TTF_GLYF ;
 149  
 150  typedef struct ttf_maxp {
 151      ULONG    version;
 152      USHORT    numGlyphs, maxPoints, maxContours;
 153      USHORT    maxCompositePoints, maxCompositeContours;
 154      USHORT    maxZones, maxTwilightPoints, maxStorage;
 155      USHORT    maxFunctionDefs, maxInstructionsDefs;
 156      USHORT    maxSizeOfInstructions, maxComponentElements;
 157      USHORT    maxComponentDepth;
 158  } TTF_MAXP ;
 159  
 160  typedef struct ttf_post_head {
 161      ULONG    formatType;
 162      FIXED    italicAngle;
 163      FWORD    underlinePosition;
 164      FWORD    underlineThickness;
 165      ULONG    isFixedPitch;
 166      ULONG    minMemType42;
 167      ULONG    maxMemType42;
 168      ULONG    minMemType1;
 169      ULONG    maxMemType1;
 170      USHORT    numGlyphs;
 171      USHORT    glyphNameIndex;
 172  } TTF_POST_HEAD ;